JP2003265004A - Transmission shaft of farm implement equipped with plurality of operating unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To slidably arrange a plurality of operating units at intervals on a body frame extending in the horizontal direction perpendicularly with the advancing direction of a machine body and stretching a transmission shaft at a desired interval. <P>SOLUTION: The farm implement is slidably arranged with a plurality of operating unit at intervals on a body frame extending in the horizontal direction perpendicularly with the advancing direction of the machine body. In the implement, (1) the transmission shaft for transmitting power from the body side to operation units 3R and 3L is constituted of a hollow outer transmission shaft 8 and an inner transmission shaft 9 slidably inserted into an outer transmission shaft 8 and the length of the inner transmission shaft 9 is set to be longer than that of the outer transmission shaft 8 and (2) operation units 3R and 3L are constituted so as to be slidable to the inner transmission shaft 9 and (3) slide widths of these operation units 3R and 3L to the inner transmission 9 are controlled. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission shaft of an agricultural work machine in which a plurality of work units are slidably arranged at intervals with respect to a main body frame extending in the horizontal direction at right angles to the traveling direction of the machine body.

[0002]

2. Description of the Related Art Conventionally, a body frame, which is detachably mounted on a rear portion of a tractor via a three-point link hitch and extends horizontally in a direction orthogonal to a traveling direction of a machine body, is rotationally driven by receiving power from the tractor. A plurality of working units such as a tillage rotor are slidably arranged at predetermined intervals, and the ridges of the crop row (intervals of 600 mm to 900 mm)
There is a well-known agricultural working machine that is used for performing the middle tillage work. One of the transmission shafts that transmits power from the main body side to the work unit has a length that is approximately equal to the machine body width, and when the work unit is slid with respect to the main body frame, the driven portion is connected to the transmission shaft. It is designed to move by spline fitting. The other one of the transmission shafts is a hollow outer transmission shaft, and is slidably fitted into the outer transmission shaft.
Further, the inner transmission shaft has a shorter length than the outer transmission shaft, and the inner transmission shaft slides and expands and contracts when the working unit is slid with respect to the main body frame.

Among the above-mentioned conventional drive shafts, the drive shaft having a length substantially equal to the machine body width (a length at which the work units can work at intervals of 900 mm) has 60 work units.
Adjusting to work at 0 mm intervals causes the shaft end of the drive shaft to project 300 mm outward from the working unit. Further, in the case where the power transmission shaft is composed of a hollow outer power transmission shaft and an inner power transmission shaft slidably inserted in the outer power transmission shaft, the working unit has a length capable of working at intervals of 900 mm. , Work unit 600
It was not possible to shrink to a distance of mm.

[0004]

As described above, in the conventional transmission shaft having the length substantially equal to the width of the machine body, when the working unit is adjusted to work at narrow intervals, the rotating drive shaft of the rotating drive shaft is adjusted. It was dangerous because the outer end of the work unit protruded outward from the work unit. Further, in the case where the transmission shaft is composed of the hollow outer transmission shaft and the hollow inner transmission shaft, it is not possible to shrink the transmission shaft to a desired length.

The present invention has been made for the purpose of solving the above-mentioned problems, and includes a hollow outer power transmission shaft and an inner power transmission shaft slidably inserted into the outer power transmission shaft. Despite being configured, the working unit is 600 mm ~
It is intended to provide a transmission shaft of an agricultural work machine including a plurality of work units that can be freely moved and adjusted at intervals of 900 mm.

[0006]

In order to achieve the above object, the present invention is characterized by having the following configurations (claims 1 to 3). A. With respect to the main body frame extending in the horizontal direction orthogonal to the traveling direction of the machine body, in an agricultural work machine in which a plurality of work units are slidably arranged at intervals, a transmission shaft for transmitting power from the main body side to the work unit, A hollow outer transmission shaft and an inner transmission shaft that is slidably fitted into the outer transmission shaft are used, and the length of the inner transmission shaft is set to be longer than the length of the outer transmission shaft.

B. The working unit is slidable with respect to the inner transmission shaft. C. The sliding width of the working unit with respect to the inner power transmission shaft was regulated.

[0008]

The transmission shaft of an agricultural working machine having a plurality of working units according to the present invention having the above-described structure has the following functions. a. The transmission shaft that transmits power from the main unit to the work unit is composed of a hollow outer transmission shaft and an inner transmission shaft that is slidably inserted into this outer transmission shaft, and the length of the inner transmission shaft is the outer transmission shaft. By setting the length so as to be longer than the length of the shaft, when the left and right work units are moved, the inner transmission shaft slides together and contracts, and the desired work interval is set. In addition, the end portion of the inner transmission shaft does not largely project outward from the working unit.

B. Since each work unit is supported so as to be slidable from side to side with respect to the main body frame, the left-right distance between the work units is adjusted more finely. c. By restricting the slide width of the work unit with respect to the inner power transmission shaft, the inner power transmission shaft is reliably prevented from coming off from the outer power transmission shaft. Also, the risk of the work unit falling off the transmission shaft is prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. 1 to 3, reference numeral 1 denotes a rotary tiller (agricultural working machine), and the rotary tiller 1 is a main body frame 2 made of a hollow pipe having a substantially square cross section that extends in a horizontal direction orthogonal to the traveling direction of the machine body. In contrast, three work units 3C, 3L, 3R
Work (cultivation) units 3 provided with are arranged at a predetermined interval, of which the central working unit 3C is attached at the central position in the longitudinal direction of the main body frame 2,
The right side working unit 3R and the left side working unit 3L have fixing / unfixing bolts 4a and are fitted and inserted on the outside of the main body frame 2 to be attached to the sliding / fixing metal fittings 4 having a substantially square cross section which can be slid / fixed. Has been. Therefore, the distance between the right working unit 3R and the left working unit 3L can be adjusted by sliding the right and left along the main body frame 2 with the central working unit 3C.

A top mast 5 connected to the top link of a tractor (not shown) and a pair of lower link connection parts connected to the lower links of the tractor on both sides of the top mast 5 from the central portion in the longitudinal direction of the body frame 2 toward the front side. And 6 are provided. A gear box 7 is provided on the rear side of the body frame 2.
The outer transmission shaft 8 extends along the main body frame 2 from the gear box 7 to the left and right sides, one of which is the transmission / support case 10 of the central working unit 3C.
Power is transmitted through the base end of the. Outer transmission shaft 8
Has a hexagonal cross section and a hollow shape.
An inner transmission shaft 9 having a rectangular shape and set to have a length longer than that of the outer transmission shaft 8 is slidably inserted in the axial direction.
It is fitted to the base end portions of the transmission and support case 10 of the R and left side working unit 3L.

The outer transmission shaft 8 and the inner transmission shaft 9 are
As shown in FIGS. 4 and 5, a retaining member 8 a is provided at the terminal end portion of the outer transmission shaft 8 and engages with an engagement groove 9 a formed in the inner transmission shaft 9. The base ends of the transmission / support case 10 of the work units 3R and 3L can slide with respect to the inner transmission shaft 9. The slide width of the base end portion of the transmission / support case 10 of the work units 3R and 3L with respect to the inner transmission shaft 9 is restricted by the stopper 9b. The outer peripheries of the outer transmission shaft 8 and the inner transmission shaft 9 are covered by a transmission shaft cover 11 so that they can expand and contract. Two input units 7a and 7b are arranged in parallel from the gear box 7 to the front side, and power is transmitted to either of them from the PTO shaft of the tractor.

The base end portion of the transmission / support case 10 of the central working unit 3C is supported rotatably back and forth around the transmission shaft center 10a with respect to the main body frame 2, and the right working unit 3R and the left working unit. The base end portion of the 3L transmission / support case 10 is supported by the sliding / fixing metal fitting 4 so as to be rotatable back and forth about the transmission shaft center 10a. In the central working unit 3C, between the bracket 2a protruding rearward from the main body frame 2 and the transmission / support case 10, and in the right working unit 3R and the left working unit 3L, sliding / fixing metal fittings are provided. Bracket 4b projecting rearward from 4 and transmission and support case 1
A compression rod 12 is interposed between each of them and 0. And each work unit 3C, 3R, 3L
Even if there is unevenness in the field during the work, the spring action of the compression rod 12 follows the unevenness.

A supporting member 13 is vertically provided at the outer end of the sliding / fixing metal fitting 4, and the supporting member 13 is provided on the supporting member 13.
The gauge wheel holder 14 and the stand holder 15 are attached. The stand holder 15 projects laterally from the gauge wheel holder 14, but the right working unit 3
It is located inside the lateral width of R and the left working unit 3L. Then, the gauge wheel holder 14 supports a gauge wheel 16 which is a device for adjusting the working depth of each of the working units 3C, 3R, 3L by using a vertical movement grip 16a so as to be vertically adjustable. A stand 17 is detachably supported by the stand holder 15, and the front and rear casters 18 are provided on the stand 17. Then, with the stand 17 supported by the stand holder 15, the rotary tiller 1 is attached to and detached from the tractor almost automatically. In addition, the rotary tiller 1 is a caster 1
8 to move it alone and store it in a warehouse, or to load and unload it on a carrier via a scaffolding board.

The transmission / support case 10 of each of the work units 3C, 3R, 3L has a chain transmission system provided therein, and as shown in FIG.
Since the plow rotor is attached to the lower end portion thereof, the sliding / fixing metal fitting 4 and the main body frame 2 supporting the working units 3C, 3R, 3L are subjected to a clockwise turning load in FIG. To alleviate this load, a support frame 19 is arranged along the body frame 2 and abuts the lower edges of the brackets 2a and 4b. Drive shafts 20 are provided on the left and right sides of the lower end of the transmission / support case 10, and circular pawl mounting flanges 21 are fixedly mounted on the drive shaft 20.
Six plow pawls 22 are attached to the pawl mounting flange 21 at equal intervals in the radial direction to form a plow rotor.
Further, a residual tillage treatment blade 23 is attached to the front side of the lower end portion of the transmission / support case 10 so as to treat the residual tillage below the transmission / support case 10.

The upper part of the middle tillage rotor is covered from the center by left and right upper covers 24, 24, side covers 27, 27, and front and rear front and rear covers 30, 31. The upper covers 24, 24 have hinges 25, 2 provided at the center thereof.
It is possible to rotate to the left and right via 5, and the operation is selected by adjusting the rotation angle of the tillage work and the tillage / cultivation work. The angle can be adjusted in a plurality of stages by the cover angle adjusting device 26. The side covers 27, 27 are rotatably supported on the outer ends of the upper covers 24, 24 via hinges 28. The turning adjusters are provided at the ends of the turning shafts of the hinges 28. By 29, the turning angles of the side covers 27, 27 can be adjusted steplessly. The front and rear covers 30 and 31 have their base ends attached to the rear ends of the upper covers 24 and 24, and are vertically rotated as the upper covers 24 and 24 are rotated and adjusted.

Next, the operation of the rotary tiller 1 having the above structure will be described. When attaching or detaching the rotary tiller 1 to or from a tractor (not shown), the stand holder 1
When the stand 17 is supported on the stand 5, it can be attached and detached almost automatically. Also, the rotary tiller 1
Can be moved individually by the caster 18, and can be stored in a warehouse or can be unloaded on a carrier via a scaffolding board. The stand 17 is detached from the stand holder 15 when the rotary tiller 1 works. Loosen the fixing / fixing release bolts 4a and slide the sliding / fixing metal fittings 4 in accordance with the ridge spacing of the crop row to move the work units 3R, 3
When L is moved to the left and right, the inner transmission shaft 9 slides with respect to the outer transmission shaft 8 and an appropriate work interval is set.

When adjusting the working depth of the working units 3C, 3R, 3L, the gauge wheel 16 is moved up and down along the gauge wheel holder 14 and fixed. When only the tillage work is performed by the work units 3C, 3R, 3L, the left and right upper covers 24, 24, the side covers 27, 27, the front and rear front and rear covers 30, are provided above the tillage rotor as illustrated. Work with 31 covered. When cultivating soil for the crop plant, cover angle adjustment device 2
6, the upper covers 24, 24 are rotated around the hinge 25 to adjust the angle upward. Also, the side cover 2
In the case of Nos. 7 and 27, the hinge 28
The turning angle can be adjusted upwards steplessly via. When the angles of the upper covers 24, 24 are adjusted, the front and rear covers 30, 31 are interlocked and rotationally adjusted.

[0019]

As described above, the transmission shaft of the agricultural working machine provided with a plurality of working units according to the present invention is defined by Claims 1 to 1.
With the configuration of 3, the following operational effects are obtained. ． The transmission shaft that transmits power from the main unit to the work unit is composed of a hollow outer transmission shaft and an inner transmission shaft that is slidably inserted into this outer transmission shaft, and the length of the inner transmission shaft is the outer transmission shaft. Since the length is set to be longer than the length of the shaft, when the left and right work units are moved, the inner transmission shaft slides together and contracts with respect to the outer transmission shaft, so that a desired work interval can be set. Moreover, the end of the inner transmission shaft does not largely project outward from the working unit, which is safe.

[0020]. Since the work unit is configured to be slidable with respect to the inner power transmission shaft, it is possible to finely adjust the left-right spacing of the work unit. ． Since the slide width of the work unit with respect to the inner transmission shaft is regulated, it is possible to reliably prevent the inner transmission shaft from coming off from the outer transmission shaft. Further, it is possible to reliably prevent the work unit from falling off from the transmission shaft.

[Brief description of drawings]

FIG. 1 is a rear view of an agricultural working machine according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a partial plan view of the same.

FIG. 4 is a partial plan view of the same main portion.

FIG. 5 is an explanatory view of the operation of FIG.

[Explanation of symbols]

1 Rotary Cultivator (Agricultural Working Machine) 2 Main Frame 2a Bracket 3 Working (Cultivating) Unit 3C Central Working Unit 3R Right Working Unit 3L Left Working Unit 4 Sliding / Fixing Bracket 4a Fixing / Unlocking Bolt 4
b bracket 5 top mast 6 lower link connecting part 7 gear box 7a, 7b input part 8 outer transmission shaft 8a retaining device 9 inner transmission shaft 9a engaging groove 9b stopper 10 transmission and support case 10a transmission shaft center 11 transmission shaft cover 12 Compression rod 13 Support member 14 Gauge wheel holder 15 Stand holder 16 Gauge wheel (working depth adjusting device) 16a
Vertical movement grip 17 Stand 18 Caster 19 Support frame 20 Drive shaft 21 Claw mounting flange 22 Middle tillage claw 23 Top tillage treatment blade 24 Upper cover 25, 28 Hinge 26 Cover angle adjusting device 27 Side cover 29 Rotating adjuster 30, 31 Front Part / rear cover

Continued front page    F term (reference) 2B034 AA07 BA06 BB08 BC06 BD03                       BE01 BE02 HA02 HA16 HB02                       HB12 HB17 HB32 HB33 HB34                       HB36 HB42 HB44                 2B041 AA09 AA15 AB05 AC03 AC20                       CA03 CA16 CD12 CG05 CG07                       CG10 DA04 DA10 DB03 DC07                       EA02 EC06

Claims (3)

[Claims] 1. An agricultural work machine in which a plurality of work units are slidably arranged at intervals with respect to a main body frame extending in a horizontal direction orthogonal to the traveling direction of the machine body, and power is transmitted from the main body side to the work unit. The power transmission shaft consists of a hollow outer power transmission shaft and an inner power transmission shaft that is slidably inserted into this outer power transmission shaft, and the length of the inner power transmission shaft is set to be longer than the length of the outer power transmission shaft. A transmission shaft of an agricultural work machine equipped with a plurality of work units characterized by the above. 2. The power transmission shaft of an agricultural work machine having a plurality of work units according to claim 1, wherein the work unit is configured to be slidable with respect to the inner power transmission shaft. 3. The transmission shaft of an agricultural work machine having a plurality of work units according to claim 1, wherein a slide width of the work unit with respect to the inner transmission shaft is regulated.